/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
*/

package org.apache.kylin.stream.core.source;

import java.util.Collection;

public interface ISourcePositionHandler {
    enum MergeStrategy {KEEP_LARGE, KEEP_SMALL, KEEP_LATEST}
    /**
     * merge the input positions and return the result position according to the merge type
     * @param positions
     * @return
     */
    ISourcePosition mergePositions(Collection<ISourcePosition> positions, MergeStrategy mergeStrategy);

    ISourcePosition createEmptyPosition();

    ISourcePosition parsePosition(String positionStr);

    String serializePosition(ISourcePosition position);

}
